Carbureter.



W. M. GENTLE.

CARBURETER.

APPLIOATION FILED DBO. z, 1909.

Patented May 30, 1911.

2 SHEETS-SHEET 1.

W] N 5555.- 64 i A TTORNEY.

lV/TNESSES:

W. M. GENTLE.

OARBURETER.

APPLICATION FILED no. 2, 1909.

Patented May 30, 1911.

2 8HEETBSREET 2.

1.v VENTOIR. Wllmm M, entle.

BY w

' t ,w- 'n ATTORNEY.

To all whom it may WILLIAM m. GENTLE, or ennnnwoon, INDIANA.

. GARBURETER Specification of Letters Patent. Patented :May 30, 1911.

Application filed December 2, 1909. Serial No. 531,022.

concern:

. Be it known that I, WILLIAM M. GENTLE, of Greenwood, county ofJohnson, and State of Indiana, have invented a certain new and usefulCarburetor; and I do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings.

The object of this invention is to provide a carbureter that willproduce a uniform mixture of air and vaporized fuel for the engine whilethe speed is increasing or decreasing, and in that connection I providean automatic means for regulating the intake of air and vaporized fuelso that a desired. uniformity of mixture is maintained. In explosiveengines where the air and fuel are mixed before they are introduced intothe cylinder, it is necessary that a nearly uniform rat-i0 of the two bemaintained to develop satisfactory power either at high or low speed.

The invention will be understood from the accompanying drawings and thefollowing description and claims.

In the drawings Figure 1 is a central vertical section through thecarbureter in idle condition, the control lever being in position todirect all the air through the mixing chamber. Fig. 2 is a section onthe line 2-2 of Fig. 1, and partially broken away. 3 is the same as Fig.1 with the position of the control lever altered and the air passingthrough the carbureter, as indicated by arrows. Fig. 4 is a section onthe line 4-4 of Fig. 1. Fig. 5 is a plan view of the device.

In detail I provide a bowl 10 open at the top and having a tubularvertical interior wall 11 which is integral with the base of the bowland extends upwardly therefrom, and which is open at the top and bottom,thereby forming an air passageway. The upper part of the bowl 10 isthreaded to receive the threaded portion of the casing 12, which formsthe mixing chamber 13 and the top of the bowl 10. The casing 12 has acentral downwardly extending tubular portion 14; that surrounds the airtube 11 but is spaced away from it slightly to form a passageway 15,through which liquid fuel may pass from the bowl to the mixingchamber.As seen in the drawings, the tubular port 14 does not reach the bottomof the bowl 10 to permit free access of the fluid to the passageway 15.

On one side of the bowl 10 and integral with it is the valve casing 16for the fuel inlet valve 17. The stem of the valve 17 extends upwardlythrough a partition wall 18 in the casing 16, and at its upper end iscapped to retain the spring 19, which normally holds the valve 17 open.A valve seat 20 is threaded and screwed into the bottom of the casing 16with a port 120 through it in position to be closed by the valve 17 Aliquid fuel supply pipe 21 is screwed into the base of the valve seat20. A fuel passageway 22 leads through the partition 18 into the chamberof the bowl 10. The bowl is provided with the usual float 24: secured toone end of the lever 25, which is fulcrumed near the center on the pin26. The other end of the lever 25 is threaded to receive the adjustablescrew 27. By means of the float and the mechanism just described, apredetermined amount of liquid is admitted and maintained in the bowl.

A tubular extension 28 is integral with the casing 12 and extendsupwardly therefrom and is th'readed at its upper end to receive thetubular valve casing 29. The latter is turned at right angles to thepipe 28 and one end 40 is the air inlet, and the other a passageway tothe intake port of the engine cylinder through pipe 30.

In the center of the valve casing 29 a valve 32 is pivoted at its upperend by a pin 33 and depends therefrom at an inclination, so that gravitytends to close it, and also a spring 3 L tends to hold it closed. Itextends across the passageway to the intake pipe 30, and, therefore,performs somewhat the function of the usual throttle valve, although itis automatic and not manipulated. It opens upwardly toward the intakepipe 30 and closes downwardly against an annular seat that is formed bycontracting the passageway through the casing 39 to some extent, seeFig, 3. One end of said spring 34 is connected with the valve 32, andthe other end to the adjustable screw 35 in the casing 29.

In the upper part of the casing 29 there is an air inlet opening overthe valve 32, which has an area substantially equal to the transversearea of the passageway leading from the throttle valve and which isclosed by a valve 36, and which might be termed the relief orback-firing opening and valve. It is horizontally disposed and ispivoted at one end on the pin 37 to the upper part of the casing 29, andis held down and closed by a flat spring 38, which is secured at one endby screws to the casing 29 and at the other end extends through thespace between the valve 36 and the strap 136 on the underside of thevalve. On the occasion of back firing, the back rush of gas would closethe valve 32 and open the valve 36 to ,the dotted line position.

The secondary air inlet 40 is at one end of the casing 29 opposite theintake pipe 30, with the valve located midway between said ends of thecasing 29. Thetransverse area of the air inlet 40 is preferably less,about one-fourth less, than the area of the intake pipe 30, so that someair will always pass up through and from the main air inlet 11 below, orat least this is true while the device is operating normally and thevalve 32 is open and until the valve 36 is opened. The air inlet 40 iscontrolled by a butterfly valve 41 on a pin 42 mounted transversely inone end of the casing-29. There is a lever 43 on one end of the pin 42for actuating the valve 41. On the other end of the pin 42 there is afinger 44 adapted to engage the ear 45 on one edge of the valve 36 toopen it, seeFigs. 4 and 5, and the dotted-line position in Fig. 3. Thelever 43 may be operated by any suitable connection therewith.

The upper surface of the tubular air inlet 11 is ground to fit the undersurface of the disk-like valve 46, which is secured to the stem 47. Thelatter is slidably mounted in the bearings 48 and 49. The bearing 49 isa spider secured to the wall 11. The bearing 48 is adjustably mounted inthe spider 50, which is secured in the extension 28. The lower end ofthebearing 48 has a head- 51 which engages one end of the spring 52. Theother end of the spring rests upon the upper surface of the valve 46 andtends to hold the valve closed. Secured to the edge of the disk 46 thereis a tubular wire fabric '53 which extends downwardly about the air inet 11 and through the passageway to --a point near the bottom of thebowl 10. The fabric is adapted to move upwardly and downwardly with theopening and closing of the valve 46. I do not desire to be limited to atubular fabric,-as any means such as vertical wires, or the like, mayoperate to accomplish the same pur ose,

In operation, the englne is started with the valves of the carbureter inthe position shown in Fig. 1. Suction from the piston opens the valves32 and 46, the springs 34 and 52 being of slight resistance. As the anvalve 41 is closed, all the air taken into the cylinder must passthrough the fluid saturated screen 53, whereby the fluid becomesvaporized and the air charged. As the valve 46 tends to reseat aftereach stroke of the piston, it can be readily seen that the screen willbe kept moist. As indicated by the arrows in Fig. 3, the air passingthrough the screen 53 strikes the lower surface of the explosive gas v acasing 12 and moves toward the center of the chamber 13, therebymaking'a very thorough mixture of the vaporized liquid and air.

This movement of the air tends to draw the passageway 15 and disperse 7pliquid from the it through the air. With the valves maintained in thisposition, the engine would immediately run to the maximum power. The 7'by opening air and less power may be reduced, however, the air valve 41,whereby'morevaporized liquid will be taken into the cylinder. As seen inFig. 3, the outside air passing through the port 40 mixes with themaintain any desired proportion of mixture with but slight the piston.

What I claim as my invention'and desire to' secure by Letters Patentisz.

resistance to the stroke of 1. A carbureter including means for.sup-* py and mixing air and fuel to form an explosive gas, a casing throughwhich the explosive gas passes from the. carbureter, a valve extendingacross said passageway that tends to open tion of the engine, meanstending to close" said valve, an opening in said caslng to the outer airin advance of said valve, a valve for closing said opening that ispivoted on u of the valve toward the outlet to v the carbureter so thatto open said last-mentioned valve, and yieldthe side back-firing willtend mg means for holding said valve normally closed.

2. A carbureter including means for supplying and mixing air and fuel toform an explosive gas,

passes from the carbureter, a ve extending across said passageway thattends to open tion of the engine, means tending to close said valve, anopening in said casing to the outer air in advance of said valve, avalve for closing said opening that ispivoted on the side the carbureterso that back-firing will tend to open said last-mentioned valve, aspring secured inside of said casing with one end loosely engaging theinner side of said valve,

and a strap on the under side of said valve 5 loosely surrounding saidspring so that the spring will normally hold the valve closed.

3. A carbureter including means for supplying and mixing air and fuel toform an explosive gas, a casing through which the 130 be stopped bymoving the con- 80 position shown in The inrushing air 85 under theinfluence of the s c- 00 a casing through which the under the influenceof the sucof the valve toward the outlet to eeaaie ex losive gas passesfrom the carbureter, a va've in said casing closing the passagewaytherethrough that is mounted at one slde of the casing so that the otherend will be free to open under the influence of the suction of theengine, yielding means for holding said valve normally closed, anopening to the outer air in the wall of said casing in advance of the"alve and adjacent the" bin ed portion of the valve so that as said vave opens its movable ortion will tend to move toward said open ng, avalve for closing said opening that is plvoted at its side opposite thepivotal point of said first-mentioned valve, so that the free ortion ofsaid second valve will be nearer the hinged portion of said first valve,and yieldin means for holding the second valve close whereby backfinngwill tend to simultaneously close the first valve and open the second.

4. A carbureter including means for supplying and mixing air and fuel toform an explosive gas, a casing through which explosive gas passes fromthe carbureter which has an outlet end and an opposite air inlet end, avalve closing and openin the passageway of the gas through said caslng,

- yielding means tending to hold the valve closed, a valve forcontrolling the air inlet end of said casing through which air can enterthe casing before it passes said first valve, an opening to the outerair in the cassageway of the gas through said casing,

yielding means tending to hold the valve closed, a valve for controllingthe air inlet end of said casing through which air can enter the casingbefore it passes said first valve, an openin to-the outer air in thecasing in advance 0 said first valve, a valve for closing said opening,means tending to hold said thlrd valve closed, a single positive meansfor opening both said second and third valves simultaneously, saidopening means being so arranged that it will not open the third valveuntil after the second valve has been partially opened.

In witness whereof, I have hereunto affixed my signature in the presenceof the witnesses herein named.

, WILLIAM M. GENTLE.

Witnesses: V

- JOSEPHINE Prmrrnn, O. M. MCLAUGHLIN.

